Which of the following statements on the mammalian circulatory system is NOT true?
-
A.
Blood in the pulimonary artery is richer in oxygen content than blood in the pulmonary vein -
B.
The blood in the hepatic portal vein is the richest in food substance -
C.
Blood flow is controlled by valves in the veins -
D.
Arteries are generally thicker and larger than veins -
E.
Fibrin helps in the formation of blood clot